Admin said:

⭐ VENDOR REVIEW RULES — Read before posting (Updated Jan 2026) Welcome to Vendor Reviews.

Right, and one flattering data point from a group buy is not consistency. Consistency means separate batches, separately commissioned, over months.

Ask again with the specifics and you will get a better answer than this one.

Admin said:

⭐ VENDOR REVIEW RULES — Read before posting (Updated Jan 2026) Welcome to Vendor Reviews.

I disagree that testing history is decisive. It tells you what a supplier did when they were being watched. Continuity of behaviour under stress — a late shipment, a failed test, a complaint — is more predictive than any run of good results.

Short answer first, then the reasoning. Prices dramatically below market are the strongest single signal, and the reason is arithmetic rather than suspicion. Synthesis, testing, and cold-chain shipping have floors. A price well under the floor means something was skipped, and the two things that get skipped are testing and content.

CarlaRPh_TPA said:

Right, and one flattering data point from a group buy is not consistency.

This matches mine closely enough to be worth saying so. The pattern that distinguishes a bad batch from an exit is behaviour rather than product. A bad batch comes with communication, a reshipment offer and a batch number. An exit comes with slower replies, pressure toward less reversible payment methods, sudden discounting, and the same reassurance repeated without any new information. The product tells you less than the correspondence does.